scholarly journals Vapor-Liquid Equilibrium Measurements of Polymeric Solutions – A Review

2020 ◽  
Vol 3 (2) ◽  
pp. 99-102
Author(s):  
Ianatul Khoiroh
Keyword(s):  
Thermophysical Properties ◽  
Chemical Properties ◽  
Comprehensive Understanding ◽  
Liquid Equilibrium ◽  
Reliable Measurement ◽  
Vapor Liquid Equilibrium ◽  
Physico Chemical ◽  
Molecular Behavior ◽  
Polymeric Solutions ◽  
Vapor Liquid

The nature of the molecule of the substance depends heavily on its physico-chemical properties. An accurate and reliable measurement of physical properties is therefore, essentially needed as a framework to gain a comprehensive understanding of the molecular behavior. Of these properties, saturated pressure is one of the most important thermophysical properties in the design of products, equipment, and processes in various chemical industries. In this review, various techniques that have been utilized in measuring the vapor-liquid equilibrium (VLE) for polymeric solutions are discussed.Keywords: VLE, polymer, measurements, pressure.

Thermophysical properties of biodiesel and related systems: Low-pressure vapor+liquid equilibrium of methyl/ethyl soybean biodiesel

2013 ◽  
Vol 64 ◽  
pp. 65-70 ◽  
Author(s):  
Josamaique G. Veneral ◽  
Dirceu L.R. Junior ◽  
Marcio A. Mazutti ◽  
Fernando A.P. Voll ◽  
Lúcio Cardozo-Filho ◽  
...  
Keyword(s):  
Thermophysical Properties ◽  
Low Pressure ◽  
Methyl Ethyl ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Soybean Biodiesel ◽  
Vapor Liquid

scholarly journals Thermophysical Properties of Mixtures of Titanium(IV) Isopropoxide (TTIP) and p-Xylene

2021 ◽  
Author(s):  
Alexander Keller ◽  
Irenäus Wlokas ◽  
Maximilian Kohns ◽  
Hans Hasse
Keyword(s):  
Thermophysical Properties ◽  
Process Design ◽  
Empirical Correlations ◽  
Liquid Equilibrium ◽  
Specific Density ◽  
Vapor Liquid Equilibrium ◽  
Self Diffusion ◽  
Spray Flame ◽  
Equilibrium Data ◽  
Vapor Liquid

Titanium(IV) isopropoxide (TTIP) is an important precursor for the production of nanoparticles by spray flame processes. In these processes, the precursor is provided in a solution in a combustible solvent, which is p-xylene here. As no thermophysical data for solutions of TTIP in p-xylene were available in the literature, they were measured in the present work. The vapor–liquid equilibrium was measured at pressures ranging from 20 to 80 kPa. The specific density, viscosity, thermal conductivity, molar isobaric heat capacity, and self-diffusion coefficients were determined experimentally at 101.3 kPa at temperatures between 293.15 and 373.15 K. Sample compositions cover the range from pure TTIP to pure p-xylene. Chemical reactions in the studied system were considered. The experiments were carried out in such a way that they do not compromise the results for the thermophysical properties. The vapor–liquid equilibrium data were correlated using the NRTL model. Empirical correlations were established for the other properties. The results provide a rational basis for spray flame process design.

scholarly journals Vapor-liquid equilibrium of mixtures containing formaldehyde, water, and butynediol

2021 ◽  
Author(s):  
Jürgen Berje ◽  
Jens Baldamus ◽  
Jakob Burger ◽  
Hans Hasse
Keyword(s):  
Multicomponent Mixture ◽  
Chemical Model ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
System P ◽  
Physico Chemical ◽  
Mass Fractions ◽  
Vapor Liquid

Measurements of the vapor-liquid equilibrium in the system formaldehyde þ water þ butynediol wereperformed at 393 K and 413 K for overall formaldehyde mass fractions between 0:1gg?1 and 0:2gg?1and overall butynediol mass fractions between 0:05 g g?1 and 0:35 g g?1. The studied system is acomplex reactive multicomponent mixture as formaldehyde reacts both with formaldehyde and buty?nediol. A predictive physico-chemical model of the vapor-liquid equilibrium from the literature [1] isvalidated by the experiments of the present work. Residue curves are calculated to illustrate thedistillation behavior of the studied system.

scholarly journals Vapor–liquid Equilibrium and Distillation of Mixtures Containing Formaldehdye and Poly(oxymethylene) Dimethyl Ethers

2021 ◽  
Author(s):  
Niklas Schmitz ◽  
Christian F. Breitkreuz ◽  
Eckhard Stöfer ◽  
Jakob Burger ◽  
Hans Hasse
Keyword(s):  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Diesel Fuels ◽  
Production Processes ◽  
Physico Chemical ◽  
Different Types ◽  
Group A ◽  
Continuous Distillation ◽  
Bottom Product ◽  
Vapor Liquid

Poly(oxymethylene) dimethyl ethers (OME, H3C–O–(CH2O)n–CH3) are promising synthetic diesel fuels. Fordesigning OME production processes, a model for describing the vapor–liquid equilibrium (VLE) in mixtures of(formaldehyde + water + methanol + methylal + OME + trioxane) is needed. Building on previous work ofour group, a physico-chemical model for the VLE in these mixtures is developed in the present work. For thedevelopment and the testing of the model, experiments of different types were carried out: VLE measurements ina thin film evaporator, batch evaporation experiments in an open still, and continuous distillation experiments ina laboratory column. The model predicts the results of the distillation experiments well. It is shown that OMEwith n ≥ 3 can be separated as bottom product from mixtures of formaldehyde, water, methanol, methylal, andOME with n ≥ 2. This separation is a critical step in a novel OME production process that increases the sustainabilityof OME production.

ChemInform Abstract: VAPOR-LIQUID EQUILIBRIUM OF (METHANOL + A HEPTANONE) AT 323.15 K

1984 ◽  
Vol 15 (21) ◽  
Author(s):  
R. G. RUBIO ◽  
J. ARACIL ◽  
M. DIAZ PENA ◽  
J. A. R. RENUNCIO
Keyword(s):  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
Vapor Liquid
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